Date: Thu, 15 Apr 2004 11:55:56 +0200
From: Reinoud van Leeuwen <reinoud.v@n.leeuwen.net>
To: pgsql-sql@postgresql.org
Subject: Re: problem porting MySQL SQL to Postgres
Message-ID: <20040415095556.GA709@spoetnik.xs4all.nl>
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On Thu, Apr 15, 2004 at 11:25:59AM +0100, Dan Field wrote:
> I've stumbled across a query I don't quite understand the error message 
> for.
> 
> This query is pulled from a working MySQL setup:
> 
> SELECT
> 	DEWEY_ID, DEWEY_HUNDREDS, DEWEY_TENS, DEWEY_ONES,  DEWEY_POINT_ONES, 
> DEWEY_POINT_TENS, 	
> 	DEWEY_POINT_HUNDREDS, DEWEY_POINT_THOUSANDS,  	DEWEY_TYPE, 
> 	DEWEY_LANG, DEWEY_SUBJECT  FROM lu_dewey
> WHERE
> 	(DEWEY_HUNDREDS = 9) AND
> 	(DEWEY_TENS >= 0) AND 	
> 	(DEWEY_TENS <= 9) AND
> 	(DEWEY_ONES = 0 || DEWEY_ONES = NULL) AND
> 	(DEWEY_POINT_ONES = 0 || DEWEY_POINT_ONES = NULL) AND
> 	(DEWEY_POINT_TENS = 0 || DEWEY_POINT_TENS = NULL) AND
> 	(DEWEY_POINT_HUNDREDS = 0 || DEWEY_POINT_HUNDREDS = NULL) AND
> 	(DEWEY_POINT_THOUSANDS = 0 || DEWEY_POINT_THOUSANDS = NULL) AND

please use 'IS NULL' instead of '= NULL'

> 	(DEWEY_TYPE = 't') AND
> 	(DEWEY_LANG = 'en')
> ORDER BY DEWEY_TENS
> 
> 
> However I'm getting the following error:
> 
>  ERROR:  Unable to identify an operator '=' for types 'character' and 
> 'boolean' You will have to retype this query using an explicit cast.

can you post the output of '\d lu_dewey'?

-- 
__________________________________________________
"Nothing is as subjective as reality"
Reinoud van Leeuwen    reinoud.v@n.leeuwen.net
http://www.xs4all.nl/~reinoud
__________________________________________________